Impeovement in machine foe boeing hubs



position when in use.

@citen gratta. lateat @fitta D. J. OWEN, OFv SPRINGVILLE, PENNSYLVANIA.Letters PatentlNo. 72,887, dated December 31, 1867.

IMPROVEMENT IN MACHINE FOR. BORING HUBS.

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TO ALL WHOM IT MAY CONGERN:

-Be it known that I, D. J. OWEN, of `Springville, in the county ofSusquehanna, and State et' Pennsylvania, have invented a new andimproved Device for Boring Hubs to receive the boxes thereof; and thatthe following description, taken in connection with the accompanyingdrawings,,hereinafter referred to, forms a full andexact specilcation ofthe `same,wherein I have set forth the nature and principles of my saidimprovements, by which my invention may be distinguished from allothers'of' a similar class, together with such parts as I claim anddesire to have secured to me by Letters Patent. l

This invention relates to a new and improved machine for boring taperholes in hubs, and has for its object simplicity of construction withfacility of manipulation, so that any personv of ordinary ability mayuse the device, and bore the hubs very expeditiously and in a perfectmanner. In the accompanying sheet'of drawings- Figure 1 is a plan or topview of my invention.

Figure 2, a transverse section of the same, taken in the line :z: w,iig. 1.

Figure 3, a view of the rear side of a hub, showing'the hole made by thecutters.

Similar letters of reference indicate like parts.

Arepresents, a shaft or arbor, one end of'which is divarieated orforked, so that the prongs a a may he inserted in holes in anysuitableupright or fixture, andthe implement thereby held properly in ahorizontal The opposite end of the shaft or arbor has a screw-thread,ax, cut upon it. B is across bar, which is firmly secured to the shaftor arbor A, and projects at equal distances from opposite sidesof thelatter, as shown clearly in fig. 1. This crossJb-ar has a longitudinalslot, b, made in it at each end to receive slides, c c, which areadjusted by set-screws, d d; and Ato each slide c an arm, G, is attachedby a pivot, e, as shown clearly in tig. 1. On the front ends of thesearms C C, cuttersiff' are formed or attached. Itis designed to have thecutters made separate from the arms, andattached thereto in sucha mannerthat they may be readily detached, when necessary, for sharpening, orfor other purposes, and also readily applied to the arms, or new onessubstituted for them. The rear ends o f the'armsC have springs, g,bearing against them; and on thel arms there is Jfitted a slide, D,-which is simply a'plate having two holes, 7L 7L, made through it forthe arms C. C to pass through, (see iig. 2.) Theholes h h, inthe plateor slide D, are rather nearer together than the pivots e c of the arms CC. E represents the huhjo be bored, which is fitted on the outer end ofthe shaft or arbor A. l It will be understood that the hubs are notbored'to receive their boxes until the wheel is fully completcd, thehubs, of course, having the usual I3inandrehholes, which admit of thembeing fitted on the shaftor arbor A, and to turn thereon without anyunnecessary play or looseness. F represents a yoke, which may beconstructed out of a single bar or piece of metahbent so as to formthree sides, z'z'j, of a quadrangle, as shown in fig. I. 'lhe ends ofthe sides z'z' of Athis yoke are clamped to two opposite spokes, k k,ofthe wheel, and the side j has a hole made centrally through it for theshaft or arbor A to pass through. To this side j ofthe arbor there issecured, conoentrically with the hole through which the shaft or arborpasses, a nut, composed of two parts, lm, the part Zbeing rigidlyattached to the side j of the yoke, and the other part, m, connected toit by a pivot, n, and secured in position by a pin, o. fits snugly onthe screw a. of the shaft or arbor.

The implement is used as follows: The conical holes in hubs which aredesigned to receive the boxes are not taper at the rear end of the hub.l They are made perfectly cylindrical for a short distance, and thencom.A mcnce to taper. The slide Dis adjusted on the arms C C at such adistance from thevcuttersff as itis designed for the box-hole to becylindrical; and, by turning the wheel, the screw` a on the shaft orarbor, and the nut of yoke F, lfeeds the hub E to the cutters ff', onecutter, f, being slightly in advance of the other cutter f', and thelatter being within thepath ofthe rotation off, so that the cutters willmake an annular groove in the hub equal to their combined width, andthereby afford room for the arms C C to enter, (see iig. When the hub Ereaches the plate or slide D, the latterA is shoved back on the armsCLL-and the cutters are gradually made to approach each other, and cutthe remainder of thchole in taper form. After the hub is lOl'ed, thepivotcd part m of the `nut is raised, and thc hub may bedrawn directlyoff from the shaft or arbor A,

tho yoke detached from' the wheel, and applied-to anotherv one, the hubof which is to be bored. The slides c c This nut, when the pivotedpart mis secured in position,

are adjusted at a to be bored.

Having thus described my invention, I claim as new, The stationaryscrew-shaft A, bearing the slide D and F, bearing the hub, composed oftwo parts, being fed to the stationary cutters b purpose specified.

greater or less distance apart, according to the required dia-meter ofthe rear end of the hole and desire to secure by LettersPatentadjustable cuttersff, in combination with the yoke when such yokeis adapted to revolve carrying the hub, the latter y means ofthe screw aand the double nut lm, as herein described for the D. J. OWEN.Witnesses:

MILES PRIGHARD, CHARLES J. KNAPP.

